Oil burner



Patented May 12, 1936 NlTED STATES PATENT OFFICE OIL BURNER Horace L. Douglas, New Britain, Conn.

Application July 28, 1932, Serial No. 625,371

2 Claims.

10 the burner.

In the accompanying drawing:-

Figure 1 is a side elevation of my improved oil burner with the fuel inlet connection, the cylindrical combustion chamber wall structure being in part broken away.

Fig. 2 is a plan view of the same.

Fig. 3 is an enlarged sectional view on the line 33 of Fig. 2.

Fig. 4 is a view showing in separated condition 20 the delivery tube and associated supporting structure.

Fig. 5 is a fragmentary plan View showing one of the inlets for fuel to the combustion chambers.

' My improved oil burner comprises a combustion chamber structure that is composed of a set of annular chambers that are defined by cylindrical shells or wall structures made of perforated sheet metal, with provision for the admission of air on the two sides of the chambers.

As shown, there are two combustion chambers respectively the outer chamber and the inner chamber ll. Said chambers project upwardly from annular channels that are provided in the main casing l2, and the shells [3 rest upon shoulders l4 that are provided on the walls E of said channels.

Said channels have generally closed bottoms that are interrupted by fuel duct openings. Thus the outer channel I6 is provided with a pair of inlet openings or passages I1 and the inner channel I8 is provided with a pair of inlet passages it.

.- The delivery tube 20 is a relatively elongated tubular structure which terminates at the upper end in the emission opening 2| that is located substantially on the axis of the burner structure.

This opening 2! is located in appreciably 5o spaced relation below the channels l6 and I8.

Thus there is an upward flow of vaporized fuel from the emission opening 2| to the combustion chambers l9 and II, the flow being actually upward and outward in the structure shown, by

55 reason of the axial location of the delivery tube 20. In the case of the fuel passages I1 and I9, these are substantially vertical, opening at their upper ends through the bottoms of the channels l6 and I8.

A chamber 22 is located in the space im- 5 mediately below the channels I 6 and I8 and communicating therewith through the passages l1 and I9 at its upper portion. The lower portion of said chamber 22 encloses.the delivery tube 20, with the opposed enclosing wall portion in spaced 10 relation thereto.

In the particular structure shown, the chamber 22 is of Y-shape, comprising a central vertical stem part and two divergent branches all merging at a junction substantially in the zone of the emission opening 2| and communication with the passages l1 and I9 is effected through horizontal branches at the upper ends of the divergent branches.

Thus the divergent branches 23 merge laterally with the horizontal branches or extensions 24, which latter serve virtually as manifolds in effecting the delivery of the vaporized fuel.

The lower portion 25 of the chamber 22 constitutes the stem of the Y-shape, the interior border wall 26 thereof being separated from the tube 20 by the annular space 21.

The delivery tube 20 may be supported in any proper manner. As shown, the lower end thereof is screwed into the upper end of a sleeve 28 that is entered into the upper end 29 of a nipple 30 that closes the bottom of the vertical chamber extension or stem 25.

The fuel intake 3| is in the form of a rightangled structure that by its upwardly directed branch 32 is entered into the bottom end of the nipple 30.

The casing I2 is relatively massive and after being initially thoroughly heated serves to maintain the vaporization of the fuel before it is delivered from the tube 20. vaporization is effected substantally as it is delivered from the tube 20 into the upper portion of the chamber 22 and thence thorough extensions 24 and passages ll 5 and I9 to the combustion chambers, the vaporized fuel being heated continually as it progresses upwardly and outwardly generally from the emission opening.

' The isolation of the tube 20 from the adjacent and associated structure serves to facilitate the substantially complete combustion that is obtained, so that there is almost complete elimination of the deposit of carbon from the fuel under operating conditions. 55

As to size and the like, with two combustion chambers the provision of two arms or branches 23 in V-relation suffices for good results. an increase inthe number of combustion chambers additional arms or branches for the distribution are provided. Wicks may be housed in the channels l6 and I9.

In starting, the channels and [8 will be flooded with liquid fuel that is ignited, resulting in heating the structures associated with the burning fuel, until the flooding material has been consumed down to the top of the delivery tube 20, the fuel supply being shut-off during the initial starting operation. Finally, the liquid fuel is again admitted and combustion is maintained by the use of fuel in vapor condition only, as it is admitted through the passages I1 and I9 to the combustion chambers l0 and H.

The structure described comprises a fuel receiving portion at the lower end, a combustion portion at the upper end, and duct-like delivery means intermediate said portions and communicating therewith, the burner comprising furthermore adjacent the junction of said receiving portion and duct-like delivery means an open ended upstanding tube for the emission of fuel received by said lower portion, said tube being in spaced relation to any and all associated walls of the burner.

I claim as my invention:

1. An oil burner comprising a base having spaced concentric fuel grooves in the top surface thereof, perforated tubes upstanding above and With communicating with said grooves and forming combustion chambers thereabove, a chamber formed in said base and communicating with said grooves, a tube in said chamber having an open delivery end spaced from the walls of said chamber, means for delivering fuel to the other end of said tube, said tube serving to vaporize the fuel delivered thereto, said chamber formed in the base being of Y-form, the said tube being located in the stem thereof, with divergent branches projecting upwardly and outwardly from said stem serving to provide the communication of the chamber with the grooves.

2. An oil burner comprising a base having spaced concentric fuel grooves in the top surface thereof, perforated tubes upstanding above and communicating with said grooves and forming combustion chambers thereabove, a chamber formed in said base and communicating with said grooves, a tube in said chamber having an open delivery end spaced from the walls of said chamber, means for delivering fuel to the other end of said tube, said tube being relatively of small diameter and of elongated form with the adjacent spaced chamber walls of correspondingly elongated and tubular form, the chamber structure above said deivery end and tubular wall being in the form of upwardly and outwardly directed delivery conduits that by their upper ends serve to provide such communication, with said grooves.

HORACE L. DOUGLAS. 

